Some tasks consist of many smaller tasks. For instance, Copy and Relink may require hundreds of individual files to be copied. To help manage these tasks, they are grouped under the originating command. So in the example of a Copy and Relink command, one copy task would appear with an Expand/Collapse icon in the Task window. Clicking the icon shows each of the individual sub-tasks.If there is more than one grouped task in the queue, all of the sub-tasks for the first group must be completed before the sub-tasks of the second group can be processed.If the session is saved and closed while several of these group tasks are in the queue, and if those tasks are the type that can be interrupted and saved when closing the session, all of the tasks reappear as part of the same group when the session is reopened.